Clamp.



J. R. PEIRCE.

CLAMP.

APPLICATION FILED OUT. 17, 1906.

FIG, 2.

WITNESSES: F

MIA

PATENTED APR. 28,1908.

EINVE-NTOR (.OlliPANY, OF NEW YORK, N. L,

No. 885,9 l9.

Orig-sisal sgqilicstio ii tiled tisroh 17, 3.968, Serial lie. Divided and this application filed Gctober 17,

SLAM? Specification 01 Letters Patent.

A SSIGNOR 'll) ROYDEN MARBLE MAlHlNERY Patented April 28, 1908.

Serial No. 339,358.

T0 all who m. i may concern:

Be it known that a citizen or the Uni l States, residing in the borough of lvlallllflt tlg, city, county, and Stste of New York, hareinvented certain new sud useful Improvements in Clamps, of which the following is a specification.

This haven ou sums to provide 4 ertoin on provemeuts 1n olorilps such as are commonly used on stone working and simi ar machine for clzim'oiug a. slob down upon 'Etlmd wl l. the slab is out or otheiwvise worked, this 2.1.;- plicotion being a division of my previous so pliootion No. 306,558, .tlled March 17, 1 306. lo order to facilitate the movement of the slab backward and forward under the tools in various positions, the clamping d ice stir-ill lusdesigned to ovoid projecting subs above the top of the slab when i... toned position.

Certain other suvantsses ore 1 an Q so nimble he.

clompi (lcVlCB Oi toe 11 v u in side elevation; Fig. is l of the olsmpingdovice; l5 spls i of the com lete device; Fig. 4 ertical Vii); port 5* in section another on adiment oi the invention.

The complete device is composed of :1 part whiohl term a clip which engages the oi the slab and o as tening device lying, when in the fastened position, below or at not substantially above the top of the clip. The device is designed, and in prefer). d form is especially useful for working slabs L ble or siniilsr .ues Where large quest, work are the me thickness so that at 1:1 e quantity of so may be done with it e 1 one size.

1.50mi EOYBEN Purses, i

Referring to the drswiiigs, and especially.-

and there projects upward through the. fork a fastening device Comprising It pin 1) having .uieuns for holding itself down, such as a head l) engaged within the undercut groove F of the bed, and moons above the bed for pressin; the clip into clamping engagement with ho work, such as :1. pair of eccentrics G, pivoted one on each side of the pin D, the accoutrics being provided with ulmudlo ll. The position of be ocventiin-s is such that when they are in the fastening position, pressing down upon the base B of the clip, llie bundle ll is in its downward position. Preferably the eccentric swiiws a little past its center in he fastening position, so us to be locked here.

It will be seen from on insport-ion of Fig. 1 that the entire clump does not project above the top of the clip. lii order to release the clump the handle ll is thrown upward. iis of dlli'eroiit heights are provided for \nuely Y- ing thicknesses oi" Work, but in marble work, as there are only it l'ew standard thicknesses to be considered, this is not :1. 881 3116 matter The pins l) with the eccentrili's mounted thereoi'l are always of the some length, the only variation necessary b mg in the cli s. The eeoeutrics are substantially poruuuieutly fastened on the pin L, and the slot between the prongs of the boss B is open at its outer end to permit the reudy withdrawal of one clip and the sub stitution of another on the some pin. Not only is the construction. exceedingly simple and cheap, but the operation is very quick and the stone is. very firmly clamped. The substitution of one clip for another is also very quickly accomplished.

Another clamp which projects above the slab only by the thickness of the metal overl ug; the edge of the slab, isshowu in Fig. 4, i which a hollow pin J carries a head E on "mg in the roove F as usual, and a clip K vertical log L entering the pin J; the mums for pressing the clip into clamping engogem t with the work being a Wedge M passing u'ough registering slots in the pin J and L respectively. This clamp has the advantage of being adjustable for o considerable variation in the thiokness of the slabs though not so convenient to operate, the Wedge M boring to be driven in or out by means of a hammer or the like; For Widely Varying thicknesses of marble, clips K with metal.

legs L of difierent lengths may be readily sub stitu lltti for each other in eonneotion with the same pin J.

The clips are preferably made of springy The clips A are preferably a little less in height then the standard thickness of nmi'hle with which they are designed. to he used so that the outer ends alone rest upon the bed and the intermediate portion is adapted to yield when the eccentric is hrm'ight down. This insures a springy clamping action which is better than a rigid one, and also facilitates the passage of the eccentric past its center to lock it down. The wheel is a coping wheel arranged to out substantially or entirely through theslah O and carried in a very low hrseket P which is made possible by the slightness of the projection of the clamping device shovethe slab.

in the mitioulal' embodiments of the invention iiiustrsted it is to be observed that the work is chimped by )i'essing it down on the bodes distinguisheli from the type of clamps which engage the edge of the work and. holdithy e horizontal pressure: end. that they may operete own a workpiece alongside the groove in which they run, as in. Fig. 1, or overlying such groove as in Fig. 4.

Altlumgh I have described with great particularity of cletaii certain specific; embodisews-e ments of understood. tiiffl'eiik, limited. to the "psrtioolo closed. 1

Various modifications in detail and in the arrangement and combination of the parts may i made h y' those skilled in the art without depei'ture from the invention.

i /hat I claim is:

A clamp for holding it slah down on at bed with flat face and an undercut gJOoVe, said clamp comprising a pin. with s heed fitting the enlarged. portion of said groove to hold it down, and adapted. to he slid along in said groove, a slip having a slot through which said pin passes, and. an eccentric :lsstehed on said pin for pressing said clip down on the .let fsee of said. bed, said eeeentrio'he'ving a, hsndle arranged. at such an angle as to lie, when in the fastened position, below the top of the slab, said slot being open at its outer end to permit withdrawal. of the slip from the pin.

In witness whereof, I have hereunto signed my name is. the presence of two suhsoirihing it witnesses. 

